Question 1099778
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<pre>
{{{x^2}}} - {{{(x-2)^2}}} = 20  ====>

{{{x^2 - (x^2 -4x + 4)}}} = 20  ====>

4x = 20 + 4 = 24   ====>  x = 6.


<U>Answer</U>.  The larger square has the side length of 6 feet.

         The smaller square has the side length of 4 feet.

         6^2 - 4^2 = 36 - 16 = 20.   ! Correct !
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Solved.